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Segments - Schedule of Reconciliation of the Company's Segment Operating Income (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2020 | Jun. 30, 2020 | Sep. 30, 2019 | Jun. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019
Segment Reporting Reconciling Item For Operating Profit Loss From Segment To Consolidated [Line Items] |  |  |  |  |  |
Total operating income (loss) | $ 11.7 | $ 11.7 | $ 32.5 | $ 32.5 | $ 15.8 | $ 90.6
Unallocated restructuring expense | 3.9 | $ 3.9 | 1.1 | $ 1.1 | 5.6 | 8.3
Segment Operating Income |  |  |  |  |  |
Segment Reporting Reconciling Item For Operating Profit Loss From Segment To Consolidated [Line Items] |  |  |  |  |  |
Total operating income (loss) | 22.6 |  | 42.3 |  | 44.6 | 110.7
Corporate |  |  |  |  |  |
Segment Reporting Reconciling Item For Operating Profit Loss From Segment To Consolidated [Line Items] |  |  |  |  |  |
Total operating income (loss) | (7.2) |  | $ (9.8) |  | (25.1) | (20.0)
Reconciliation of Company's Segment Operating Income |  |  |  |  |  |
Segment Reporting Reconciling Item For Operating Profit Loss From Segment To Consolidated [Line Items] |  |  |  |  |  |
Unallocated restructuring expense | $ (3.7) |  |  |  | $ (3.7) | $ (0.1)

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